This is really far into the future in my thoughts, and I think maybe around this time, bitcoins will already be in consideration for adoption. Bitcoin will maybe at this time take up more role as a currency than for just investment.
This won't stop Bitcoin from being a profiting investment, Bitcoin being a currency with more adoption will push for more people to know about Bitcoin and decide to hodl it as an asset. Aren't you forgetting that irrespective of how worthless fiats are, there are people still hodling them as an investment because they can trade their devalued currency for something more promising just as the US dollars is being hoard because of its relevance in world trade.
I agree with you dear When holding onto Bitcoin it is important we must have plan. It can be tempting to sell but remember that buying back can be hard or impossible if prices go up. My advice is to make plan and stick to it knowing you will sell eventually.
Better still have two wallets, your short term wallet and your long goals hodling wallets that you can be adding to as you get more income while that of the short term can be traded for fiats when you feel the peak of the bull market has reach and you plan on selling to rebuy. This way you don't loss your long term Bitcoin to market volatile while you're still enjoying the joy of selling high and buying low.